UTC Decimal Time + French Republican-Style Calendar

The time is decimal: the day is divided into 10 hours, each hour into 100 minutes, and each minute into 100 seconds. The calendar is also decimal-ish: 12 equal months, 30 days per month, 3 ten-day weeks per month, plus a few extra days at the end of the year.

0:00:00

UTC decimal time: 10 hours · 100 minutes · 100 seconds

Calendar date

Year —

Month —

10-day week —

Day —

Year progress loading...

How to read the calendar

A normal year has 365 days. The first 360 days are arranged as 12 months × 30 days. Every month has exactly 3 ten-day weeks. Day 10 of each ten-day week is the rest day.

YearStarts on September 22, 1792 as Year 1.

Month12 months, each exactly 30 days long.

Week3 weeks per month, each exactly 10 days long.

Extra days5 year-end festival days, or 6 in a leap year.

Month namesEnglish nature-based labels inspired by the French Republican months.

Clock basisThis page uses UTC, so the date changes at UTC midnight.

This is a simple proleptic version for modern display: it extends the calendar forward from September 22, 1792 and uses a Gregorian-style leap-year rule.